Regulation and planning

Building Regulations for a Roof Replacement in England

Replacing a roof covering is controlled work in England once it passes a threshold of area, at which point the renewed element has to meet a current thermal standard and the work has to be notified. Check where your own roof work sits under Building Regulations, then book a survey to evidence it. This page covers: Building Regulations · Approved Document L · Thermal element.

Replacing a roof covering becomes controlled work once it passes a threshold of area. Renovating more than half a thermal element triggers the upgrade duty, and a thermal element is a roof, wall or floor separating heated space from unheated.

The threshold is a proportion of the whole element rather than a fixed area, so the same job is controlled on one roof and not on another. Over half. Controlled work: it has to be notified, and the renovated thermal element must meet the current standard in Approved Document L. Half or less. Like-for-like repair of a smaller area is generally not controlled work and does not need notifying.

Two routes, and what each leaves you holding

A building control application Submitted before work starts, and inspected by the local authority. It is our route, because we hold no scheme registration.
Self-certification A contractor registered with a competent person scheme notifies directly, which avoids the separate application and its fee.
A completion certificate The evidence of compliance either route produces. It is wanted at sale and by some insurers.
Structural work is separate Altering rafters, forming openings or changing loading is controlled in its own right, whatever the covering area.

Building Regulations and planning permission are separate regimes, and satisfying one says nothing about the other. The practical consequence of skipping notification is not enforcement — it is a conveyancing problem years later, when the absent certificate becomes the seller's.

This page is general information about how the rules apply, not legal advice. Confirm your own position with the authority named below before work starts. The authority here is Birmingham City Council building control.

4 related pages cover this in more depth: nfrc competent person scheme self-certification, Roof Insulation Upgrades Fitted During a Birmingham Recovering, new roof birmingham and does a new roof need planning permission.

Do you need building regulations approval for a new roof?

Yes, where the work is controlled. Replacing a substantial proportion of a roof covering is controlled work requiring notification, and the renovated element must meet the current thermal standard. Like-for-like repair generally is not.

The application of Building Regulations is control construction standards, separately from planning permission. The relevance of Approved Document L is sets the conservation of fuel and power requirements for renovated thermal elements; a thermal element is a roof, wall or floor separating heated from unheated space.

What is the 50 per cent rule?

Renovating more than half the area of a thermal element triggers a duty to upgrade that element to the current standard. A roof is a thermal element where it separates heated space from outside, so a substantial recovering engages it.

Controlled work is notified to building control before or at completion; a building control application, or self-certification through a competent person scheme.

What are the two routes to compliance?

Either submit a building control application before work starts, or appoint a contractor registered with a competent person scheme who self-certifies the work and notifies building control directly. The second route avoids a separate application.

The completion certificate has a deliverable of evidence of compliance, required at sale and by some insurers. Like-for-like repair is generally not controlled work. Altering rafters, forming openings or changing loading is separately controlled.

Is this the same as planning permission?

No. Building Regulations control construction standards and thermal performance. Planning permission controls appearance and amenity. They are separate regimes, and satisfying one tells you nothing about whether the other applies.

An absent certificate surfaces at sale, when it becomes the seller's problem.

Renovating over half a thermal element triggers the upgrade duty.

What happens if the work was never notified?

The absence usually surfaces during a sale, when a buyer's solicitor asks for the certificate. Resolving it afterwards means a regularisation application, which is slower and more expensive than notifying at the time.

Building Regulations control construction standards, while planning controls appearance.
Competent person scheme registration permits a self-certification, instead of an application.
An absent certificate surfaces at sale as the seller's problem.

Repairs sit outside this.

When a repair is not controlled work

Building Regulations and planning permission are separate; satisfying one says nothing about the other, and most homeowners conflate them. The practical consequence of skipping notification is not enforcement — it is a conveyancing problem years later.

Getting compliance handled

A registered contractor notifying directly avoids a separate building control application and its fee. Like-for-like repair generally falls outside the duty, which matters because contractors sometimes claim otherwise to justify a bigger job.

Building Regulations, and 5 more

Building Regulations
Approved Document L
thermal element
notification
competent person scheme
completion certificate

Book a free roof survey

Or call 07446 375079.